Fastener



FIG. 1 is a front perspective view of a fastener according to the present invention;

FIG. 2 is a rear perspective view of the fastener according to the present invention;

FIG. 3 is a top view thereof, the bottom view being a mirror image thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof, the left side view being a mirror image thereof; and,

FIG. 6 is a rear view thereof. 

CLAIM The ornamental design for a fastener, as shown and described. 